diff --git a/test/functional/setup_scripts/chronik-client_websocket.py b/test/functional/setup_scripts/chronik-client_websocket.py
--- a/test/functional/setup_scripts/chronik-client_websocket.py
+++ b/test/functional/setup_scripts/chronik-client_websocket.py
@@ -178,6 +178,7 @@
         yield True
 
         self.log.info("Step 8: Finalize the block containing these txs with Avalanche")
+        assert False
         next_cb_txid = node.getblock(next_blockhash)["tx"][0]
         with node.assert_debug_log([f"Avalanche finalized block {next_blockhash}"]):
             self.wait_until(lambda: is_finalblock(next_blockhash))